75120120121 has 8 divisors (see below), whose sum is σ = 76562962560. Its totient is φ = 73678221552.

The previous prime is 75120120113. The next prime is 75120120133. The reversal of 75120120121 is 12102102157.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75120120121 - 2³ = 75120120113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75120120092 and 75120120101.

It is not an unprimeable number, because it can be changed into a prime (75820120121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74211 + ... + 394648.

It is an arithmetic number, because the mean of its divisors is an integer number (9570370320).

Almost surely, 2^75120120121 is an apocalyptic number.

It is an amenable number.

75120120121 is a deficient number, since it is larger than the sum of its proper divisors (1442842439).

75120120121 is a wasteful number, since it uses less digits than its factorization.

75120120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471935.

The product of its (nonzero) digits is 280, while the sum is 22.

Adding to 75120120121 its reverse (12102102157), we get a palindrome (87222222278).

The spelling of 75120120121 in words is "seventy-five billion, one hundred twenty million, one hundred twenty thousand, one hundred twenty-one".